142 citations · 353 across the 6 of their papers we have counts for
7 papers
Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
Rouzbeh Allahverdi, Steen Hannestad, Asko Jokinen +2
In general the gravitino mass and/or the soft supersymmetry breaking masses in the observable sector can be much larger than the TeV scale. Depending on the relation between the ma…
Cosmological constraints on string scale and coupling arising from tachyonic instability
Kari Enqvist, Asko Jokinen, Anupam Mazumdar +2
We demonstrate that string motivated inflation ending via tachyonic instability leaves a detectable imprint on the cosmic microwave background (CMB) radiation by virtue of the exci…
Non-Gaussianity from Instant and Tachyonic Preheating
Kari Enqvist, Asko Jokinen, Anupam Mazumdar +2
We study non-Gaussianity in two distinct models of preheating: instant and tachyonic. In instant preheating non-Gaussianity is sourced by the local terms generated through the coup…
Non-Gaussianity from Preheating
Kari Enqvist, Asko Jokinen, Anupam Mazumdar +2
We consider a two-field model for inflation where the second order metric perturbations can be amplified by a parametric resonance during preheating. We demonstrate that there can…
Seed perturbations for primordial magnetic fields from MSSM flat directions
Kari Enqvist, Asko Jokinen, Anupam Mazumdar
We demonstrate that the MSSM flat directions can naturally account for the seed magnetic fields in the early Universe. The non-zero vacuum expectation value of an MSSM flat directi…
Inflation from multiple flat directions
Asko Jokinen, Anupam Mazumdar
The paper has been withdrawn by authors. The issues studied in this paper were changed so much that we have published a new paper considering these issues. See hep-th/0406074